luther beagle who joins us from -- today from san francisco. dr. beagle, good to talk to you again. >> hi, how you doing? >> bill: we're doing good. are you still on mars time even though you're in san francisco? >> no. i made it off mars time. didn't get divorced. was pretty happy about the whole thing. >> bill: off mars time for a couple of days huh? >> we got off mars time about four weeks ago. we're all on earth time. >> bill: why is that? >> well, it is the way -- it was killing a lot of people. it is really difficult to do. so we went down to regular day shifts so now we're working like 8:00 to 7:00 during the day. and we program the rover and we get the information back. it is a little inefficient but it makes for a much happier work environment. >> how many hours are there in a mars day? >> 24 hours and 40 minutes. >> bill: so then you have to calculate that. >> what happens is your day starts 40 minutes later and it gets weird when it gets like 2:00 in the morning. >> bill: all right now we want to talk about mars. first, i have to ask you